Re: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400 driver

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On 08/11/2016 09:30, Noam Camus wrote:
>> From: Daniel Lezcano [mailto:daniel.lezcano@xxxxxxxxxx] 
>> Sent: Tuesday, November 1, 2016 10:02 PM
> ...
>> Assuming cpu0 and cpu1 are sibling, does
> 
>> taskset 0x1 time sleep 2 & taskset 0x2 time sleep 3
> 
> I will use 16,17 instead of 0,1
>> give a correct result without a dmesg log ?
> [root@192.168.8.2 /]$ [root@192.168.8.2 /]$ taskset 65536 time sleep 2 & taskset 131072 time sleep 3

Thanks for providing the numbers.

So there is no weird messages in dmesg ?

> real    0m 2.54s
> user    0m 0.04s
> sys     0m 0.14s
> real    0m 3.47s
> user    0m 0.00s
> sys     0m 0.15s
> [1]+  Done                       taskset 65536 time sleep 2
> 
> Seem OK to me.

I'm not sure of that.

2.54 instead of 2
3.47 instead of 3

0.02 time drift could be acceptable but 0.54 or 0.47 is too much.

And 0.15 in sys also a big number AFAICT.

Is the system in NO_HZ ?



-- 
 <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux